assertEquals(expected, NbtException.getErrorString(NbtException.ERR_NAM_SRVC, NbtException.FMT_ERR));
    }

    @Test
    @DisplayName("getErrorString for name service error with unknown code")
    void testNameServiceUnknown() {
        int unknown = 99;
        String expected = "ERR_NAM_SRVC/Unknown error code: 99";
        assertEquals(expected, NbtException.getErrorString(NbtException.ERR_NAM_SRVC, unknown));
    }